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Assessment of a 2D Synthetic Turbulence Method for Predicting the ACAT1 Fan's Broadband Noise

Kissner, Carolin Anja and Guerin, Sebastien and Behn, Maximilian (2019) Assessment of a 2D Synthetic Turbulence Method for Predicting the ACAT1 Fan's Broadband Noise. In: 25th AIAA/CEAS Aeroacoustics Conference. 25th AIAA/CEAS Aeroacoustics Conference, 20.-23. Mai 2019, Delft, The Netherlands. DOI: 10.2514/6.2019-2501

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Fan broadband noise, particularly rotor-stator-interaction noise, is an important noise mechanism in modern aircraft engines. However, its prediction is not trivial. Applied approaches range from fast but simplified analytical approaches to computationally demanding scale-resolving simulations. RANS-informed synthetic turbulence methods present a promising compromise between accuracy and cost. Two-dimensional simulations on a single streamline are especially attractive as they can be easily computed on conventional computers. While a good agreement with NASA SDT experimental data could be shown in the past, it can be questioned how representative a 2D simulation at an arbitrarily chosen streamline position can truly be since the flow and turbulence in the interstage region is highly dependent on the fan geometry and its operating conditions. In this paper, the authors propose a new, 3D-equivalent approach for setting up a 2D synthetic turbulence simulation. The results are compared to approaches that were applied for past investigations. In addition, a detailed comparison to the comprehensive, acoustic test data for the AneCom AeroTest Rotor 1 (ACAT1) transonic fan is shown. The good agreement between numerical and experimental data proves that a fast, two-dimensional synthetic turbulence method is indeed capable of accurate fan broadband noise predictions.

Item URL in elib:https://elib.dlr.de/132271/
Document Type:Conference or Workshop Item (Speech)
Title:Assessment of a 2D Synthetic Turbulence Method for Predicting the ACAT1 Fan's Broadband Noise
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kissner, Carolin AnjaCarolin.Kissner (at) dlr.dehttps://orcid.org/0000-0003-1094-0939
Guerin, SebastienSebastien.Guerin (at) dlr.deUNSPECIFIED
Behn, MaximilianMaximilian.Behn (at) dlr.dehttps://orcid.org/0000-0001-8478-8269
Date:May 2019
Journal or Publication Title:25th AIAA/CEAS Aeroacoustics Conference
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.2514/6.2019-2501
Keywords:Fanlärm, Breitbandlärm, Simulation, Turbulenz
Event Title:25th AIAA/CEAS Aeroacoustics Conference
Event Location:Delft, The Netherlands
Event Type:international Conference
Event Dates:20.-23. Mai 2019
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation methods
Location: Berlin-Charlottenburg
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Kissner, Carolin Anja
Deposited On:09 Dec 2019 09:45
Last Modified:09 Dec 2019 09:45

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